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Modern televisions use small amounts of power - Edexcel - GCSE Physics - Question 4 - 2012 - Paper 1
Question 4
Modern televisions use small amounts of power. (a) Which of these describes power. Put a cross (X) in the box next to your answer. ☐ A distance travelled per sec... show full transcript
Worked Solution & Example Answer:Modern televisions use small amounts of power - Edexcel - GCSE Physics - Question 4 - 2012 - Paper 1
Step 1
Step 2
(b)(i) Calculate the power consumption of the television when it is switched on.
Answer
To calculate the power consumption, we use the formula:
Where:
- P is the power in watts (W)
- V is the voltage in volts (V)
- I is the current in amperes (A)
Substituting the values:
Therefore, the power consumption is approximately 58 W.
Step 3
(b)(ii) Describe what is meant by current.
Answer
Current is defined as the flow of electric charge in a circuit. It can be described in the following ways:
- It is the rate of flow of electric charge per unit time, typically measured in amperes (A).
- The flow involves electrons or ions, which carry the charge, often measured in coulombs (C). Current represents how many coulombs pass through a point in the circuit per second.